induction

(noun)

Use inductive reasoning to generalize and interpret results from applying Newton's Law of Gravitation.

Related Terms

  • magnetic flux
  • inverse
  • electromotive force

(noun)

The generation of an electric current by a varying magnetic field.

Related Terms

  • magnetic flux
  • inverse
  • electromotive force

Examples of induction in the following topics:

  • Inductance

    • Specifically in the case of electronics, inductance is the property of a conductor by which a change in current in the conductor creates a voltage in both the conductor itself (self-inductance) and any nearby conductors (mutual inductance).
    • Self-inductance, the effect of Faraday's law of induction of a device on itself, also exists.
    • where L is the self-inductance of the device.
    • Units of self-inductance are henries (H) just as for mutual inductance.
    • The inductance L is usually a given quantity.
  • Inductance

    • The answer is yes, and that physical quantity is called inductance.
    • Mutual inductance is the effect of Faraday's law of induction for one device upon another, such as the primary coil in transmitting energy to the secondary in a transformer.
    • The larger the mutual inductance M, the more effective the coupling.
    • Self-inductance, the effect of Faraday's law of induction of a device on itself, also exists.
    • where L is the self-inductance of the device.
  • Faraday's Law of Induction and Lenz' Law

    • This relationship is known as Faraday's law of induction.
    • The minus sign in Faraday's law of induction is very important.
    • As the change begins, the law says induction opposes and, thus, slows the change.
    • This is one aspect of Lenz's law—induction opposes any change in flux.
    • Express the Faraday’s law of induction in a form of equation
  • Changing Magnetic Flux Produces an Electric Field

    • Faraday's law of induction states that changing magnetic field produces an electric field: $\varepsilon = -\frac{\partial \Phi_B}{\partial t}$.
    • We have studied Faraday's law of induction in previous atoms.
    • In a nutshell, the law states that changing magnetic field $(\frac{d \Phi_B}{dt})$ produces an electric field $(\varepsilon)$, Faraday's law of induction is expressed as $\varepsilon = -\frac{\partial \Phi_B}{\partial t}$, where $\varepsilon$ is induced EMF and $\Phi_B$ is magnetic flux.
    • Therefore, we get an alternative form of the Faraday's law of induction: $\nabla \times \vec E = - \frac{\partial \vec B}{\partial t}$.This is also called a differential form of the Faraday's law.
    • Faraday's experiment showing induction between coils of wire: The liquid battery (right) provides a current which flows through the small coil (A), creating a magnetic field.
  • RL Circuits

    • Recall that induction is the process in which an emf is induced by changing magnetic flux.
    • Mutual inductance is the effect of Faraday's law of induction for one device upon another, while self-inductance is the the effect of Faraday's law of induction of a device on itself.
    • An inductor is a device or circuit component that exhibits self-inductance.
    • The characteristic time $\tau$ depends on only two factors, the inductance L and the resistance R.
    • The greater the inductance L, the greater it is, which makes sense since a large inductance is very effective in opposing change.
  • Sound Systems, Computer Memory, Seismograph, GFCI

    • The microphone works by induction, as the vibrating membrane induces an emf in a coil.
    • The speaker is then driven by modulated electrical currents (produced by an amplifier) that pass through and magnetize (by inductance) a speaker coil of copper wire, creating a magnetic field.
    • This is done by inductance.
  • Induced Charge

    • Electrostatic induction is the redistribution of charges within an object that occurs as a reaction to the presence of a nearby charge.
    • Electrostatic induction is the redistribution of charge within an object, which occurs as a reaction to a nearby charge.
  • Energy Stored in a Magnetic Field

    • A simple generator uses inductance to create a current by the rotation of a magnet within a coil of wire.
    • If the current changes, the change in magnetic flux is proportional to the time-rate of change in current by a factor called inductance (L).
    • (Eq. 1), where L is the inductance in units of Henry and I is the current in units of Ampere.
  • RLC Series Circuit: At Large and Small Frequencies; Phasor Diagram

    • Response of an RLC circuit depends on the driving frequency—at large enough frequencies, inductive (capacitive) term dominates.
    • If the frequency is high enough that XL is much larger than R as well, the impedance Z is dominated by the inductive term.
  • Motional EMF

    • As seen in previous Atoms, any change in magnetic flux induces an electromotive force (EMF) opposing that change—a process known as induction.
    • Motion is one of the major causes of induction.
    • When flux changes, an EMF is induced according to Faraday's law of induction.
    • To find the magnitude of EMF induced along the moving rod, we use Faraday's law of induction without the sign:
Subjects
  • Accounting
  • Algebra
  • Art History
  • Biology
  • Business
  • Calculus
  • Chemistry
  • Communications
  • Economics
  • Finance
  • Management
  • Marketing
  • Microbiology
  • Physics
  • Physiology
  • Political Science
  • Psychology
  • Sociology
  • Statistics
  • U.S. History
  • World History
  • Writing

Except where noted, content and user contributions on this site are licensed under CC BY-SA 4.0 with attribution required.